Diesel fuel analysis by GC-FIMS: Aromatics, n-paraffins, and isoparaffins

Citation
Y. Briker et al., Diesel fuel analysis by GC-FIMS: Aromatics, n-paraffins, and isoparaffins, ENERG FUEL, 15(1), 2001, pp. 23-37
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environmental Engineering & Energy
Journal title
ENERGY & FUELS
ISSN journal
0887-0624 → ACNP
Volume
15
Issue
1
Year of publication
2001
Pages
23 - 37
Database
ISI
SICI code
0887-0624(200101/02)15:1<23:DFABGA>2.0.ZU;2-W
Abstract
A reliable characterization method giving a detailed hydrocarbon compositio n profile for transportation fuels is an important part of any process that optimizes fuel reformulation and engine design to reduce regulated emissio ns. This study describes the development of a modified gas chromatography f ield ionization mass spectrometry (GC-FIMS) method for detailed hydrocarbon type determination of diesel fuel. Diesel fuels were analyzed by GC-FIMS, and the calculated hydrocarbon type composition profile was compared with t hat determined by other standard techniques. Results for total saturates, t otal aromatics, monoaromatics, and polyaromatics contents correlated well. Selected ion chromatograms demonstrated the separation of isoparaffins and normal paraffins in typical diesel fuels. The GC-FIMS method produced resul ts for isoparaffin, normal paraffin, and cycloparaffin contents that did no t require sample pretreatment to separate saturates and aromatics fractions . Analysis of a gasoline sample showed excellent agreement between GC-FIMS and detailed hydrocarbon analysis or PIONA for total cycloparaffin content, and reasonable agreement for iso- and normal paraffin contents. The normal paraffin contents of selected diesel blends measured by GC-FIMS correlated well with that measured by other methods. Experiments with internal standa rdization verified the accuracy of the GC-FIMS method for selected hydrocar bon isomers.